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Crops in this Family: Hemp, Cannabis Sativa, Hops, Hackberries, Common Hops
Below is a tissue nutrient sufficiency table for the Hemp Family (Cannabaceae), focusing primarily on hemp (Cannabis sativa L.), as it is the most agriculturally significant member of the family. This table provides macro- and micronutrient sufficiency ranges, leaf water content (LWC), and Brix values across key growth stages. The values are synthesized from available research, including studies from NC State Extension (2021) and other sources like Bryson and Mills (2014), Landis et al. (2019), and Kalinowski et al. (2020), which provide hemp-specific foliar nutrient data, particularly for CBD varieties.
Growth stages are defined as:
- Vegetative (seedling to pre-flowering)
- Flowering (bloom initiation)
- Fruit/Seed Development (seed or bud formation)
- Maturation (senescence to harvest)
- Residue
Nutrient concentrations are in percentages (%) for macronutrients and parts per million (ppm) for micronutrients, with LWC as a percentage of fresh weight and Brix (°Bx) as soluble solids in leaf sap.
| Growth Stage |
N (%) |
P (%) |
K (%) |
Mg (%) |
Ca (%) |
S (%) |
||||||
|
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
|
|
Vegetative |
4.00 |
5.50 |
0.30 |
0.60 |
2.00 |
3.50 |
0.30 |
0.60 |
1.00 |
2.50 |
0.20 |
0.40 |
|
Flowering |
3.50 |
4.50 |
0.20 |
0.50 |
1.80 |
3.00 |
0.30 |
0.60 |
1.20 |
2.80 |
0.20 |
0.40 |
|
Fruit/Seed Development |
3.00 |
4.00 |
0.20 |
0.40 |
1.80 |
2.80 |
0.30 |
0.60 |
1.20 |
2.80 |
0.20 |
0.40 |
|
Maturation |
2.50 |
3.50 |
0.20 |
0.40 |
1.50 |
2.50 |
0.30 |
0.60 |
1.00 |
2.50 |
0.20 |
0.40 |
|
Residue |
2.00 |
3.00 |
0.20 |
0.40 |
1.50 |
2.00 |
0.30 |
0.60 |
1.00 |
2.00 |
0.20 |
0.40 |
|
B (ppm) |
Zn (ppm) |
Mn (ppm) |
Fe (ppm) |
Cu (ppm) |
Mo (ppm) |
|||||||
|
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
|
|
Vegetative |
20 |
50 |
20 |
60 |
20 |
100 |
50 |
150 |
5 |
15 |
0.10 |
1.00 |
|
Flowering |
25 |
60 |
20 |
60 |
20 |
100 |
50 |
150 |
5 |
15 |
0.10 |
1.00 |
|
Fruit/Seed Development |
30 |
70 |
20 |
60 |
20 |
100 |
50 |
150 |
5 |
15 |
0.10 |
1.00 |
|
Maturation |
20 |
50 |
20 |
60 |
20 |
100 |
50 |
150 |
5 |
15 |
0.10 |
1.00 |
|
Residue |
15 |
40 |
20 |
60 |
15 |
75 |
40 |
120 |
4 |
10 |
0.10 |
1.00 |
|
LWC |
BRIX |
|||||||||||
|
Min |
Max |
Min |
Max |
|||||||||
|
Vegetative |
85 |
90 |
8 |
12 |
||||||||
|
Flowering |
80 |
88 |
10 |
15 |
||||||||
|
Fruit/Seed Development |
78 |
85 |
10 |
18 |
||||||||
|
Maturation |
75 |
82 |
8 |
14 |
||||||||
|
Residue |
65 |
70 |
6 |
12 |
||||||||
Scanning Recommendation:
- Ensure that over 25% of the scan bed is covered with a single layer of vegetation.
- Nutrient and LWC data are from the most recently mature leaf (MRML), typically the third to fifth leaf from the growing point, as recommended by NC State Extension.
